Hi,
I am trying to find the answer for below points,

% of an item sales among the total number of all items sales

from the total sales how many are done online
Meaning total sales is 50,000
5000 are from online sales so it’s 10%.
From the total number of online sales, what is the percentage of a specific platform an item is sold?
Eg: $5000 is the total online sales 20% is from Platform 1, 60% are from Platform B & 5% are from Platform C.
I am using the calculation “percentOfTotal (sum(Sales), [Platform])”, please refer to the attached image
Can someone help me with this!!
Thanks in advance